condition mean min max ZT0-3 0.2770589025 0.08470624199999999 0.46941156300000003 ZT4-7 1.49470619075 1.118552026 1.8708603555 ZT8-11 3.175516996 2.592324848 3.758709144 ZT12-15 4.93024100075 3.6958776655000003 6.164604335999999 ZT16-19 2.6772448345 2.6217895855 2.7327000835 ZT20-23 2.5464229785 2.4610564285 2.6317895284999997